364 The American Geologist. June, isoo 
Angelin, the division c, or the true Primordial fauna of 
Barrande. 
Dr. A. G. Nathorst, wlien exploring the celebrated locality 
of Andrarum, in Scania, in 1868 and 1869, found below, what 
Avas then considered the oldest Parndoxides beds, or Regio A 
of Angelin, another trilobitic zone or group of strata contain- 
ing a Paradoxides-Y'L&.Q form, an Ellij^socephalus, an Arion- 
ellus and a Lingula. Professor 0. M. Torell, director of the 
geological survey of Sweden, named the Paradoxides-like, 
Paradoxides iDalhenhergi and at the same time he named the 
beds : "the Paradoxides walhenhergi strata ;" but he did not 
give any description or figure of the Paradoxides. 
In 1870 Linnarsson discovered in Norway, near lake Moesen, 
the same lower horizon of the Primordial zone, naming and 
figuring the Paradoxides-Wke form, Paradoxides kjerulU; 
("Om nogra foeisteninger fraon Sveriges och Norges Primor- 
dialzon," 1871). My lamented friend the late professor 
Kjerulfin his "Sparagenitf jeldet," published in 1872, gives 
also good drawings of that trilobite under the name Paradox- 
ides lijeruia. In 1876 Linnarsson recognized that the Par- 
adoxides lijerulfi was identical with Paradoxides walhenbergi 
of Torell. The celebrated geologist and palaeontologist, pro- 
fessor W. C. Broegger, when working under the direction of his 
teacher, professor Kjerulf, on the geological survey of Norway, 
recognized during the summer of 1877, an excellent station of 
that older horizon of the Paradoxides zone at the station of 
Krekling, northeast of Christiania, and he published in 1878, 
in ]}fyt Ifagazin for Naturvidenskalume, tome xxiv, 1, Chris- 
tiania, a most important and interesting paper entitled : "Om 
Paradoxides skifrene ved Krekling." In it professor Broegger 
changed the reference by Torell and Linnarsson of Paradox- 
ides, into the genus Olenellus Hall, and he called that tril- 
obite first discovered by professor Nathorst Olenellus I'jerulii. 
Broegger does not give any figure, but refers to the drawings 
of Linnarsson, Kjerulf and Angelin. 
When professor Broegger made this reference there was not 
a single complete and well preserved Elliytoceplialus ( Olen- 
ellus) figured and described. He took for the type of Olenellus 
the figure given by Mr. J. Hall, in February, 1861, in his sec- 
ond edition of his "Note upon the trilobites of the shales of 
the Quebec group in the town of Georgia, Vermont" ( Thir- 
